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Dinosaurs

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There are two major groups of DINOSAURS. The first group, the Ornithiscians, were the herbivores such as Triceratops, Stegosaurus, and Iguanodon.

The other group, the Saurischians, included both the enormous long-necked dinosaurs, like Apatosaurus, as well as all known meat-eating dinosaurs, like Velociraptor and Tyrannosaurus rex. Birds are descended from Saurischian dinosaurs and are the closest living relatives to dinosaurs alive today. Bird Evolution. Dinosaur size chart. Dinosaur Found (Accidentally) by Miners in Canada. This article appears in the June 2017 issue of National Geographic magazine. On the afternoon of March 21, 2011, a heavy-equipment operator named Shawn Funk was carving his way through the earth, unaware that he would soon meet a dragon. That Monday had started like any other at the Millennium Mine, a vast pit some 17 miles north of Fort McMurray, Alberta, operated by energy company Suncor.

Hour after hour Funk’s towering excavator gobbled its way down to sands laced with bitumen—the transmogrified remains of marine plants and creatures that lived and died more than 110 million years ago. It was the only ancient life he regularly saw. In 12 years of digging he had stumbled across fossilized wood and the occasional petrified tree stump, but never the remains of an animal—and certainly no dinosaurs.

But around 1:30, Funk’s bucket clipped something much harder than the surrounding rock. This May Be Our Best Idea of What a Dinosaur Really Looked Like. Picture a red-headed woodpecker crossed with a tiny velociraptor, and you have a good mental image of Anchiornis, a foot-high dinosaur that hails from the Late Jurassic.

This May Be Our Best Idea of What a Dinosaur Really Looked Like

That’s the conclusion of scientists who examined nine specimens of this ancient animal, lighting up its previously invisible soft tissues with high-powered lasers so they could get an even better idea of the dinosaur’s true dimensions. The study shows that Anchiornis was remarkably bird-like, with drumstick-shaped legs and long forearms connected by a layer of skin called the patagium. It also had a slender tail and scaly footpads reminiscent of those on a chicken.

Spinosaurus. 2020 Reconstruction of Spinosaurus. The "Fighting Dinosaurs" specimen. Smaller than other dromaeosaurids like Deinonychus and Achillobator, Velociraptor nevertheless shared many of the same anatomical features.

The "Fighting Dinosaurs" specimen

It was a bipedal, feathered carnivore with a long tail and an enlarged sickle-shaped claw on each hindfoot, which is thought to have been used to tackle prey. Velociraptor can be distinguished from other dromaeosaurids by its long and low skull, with an upturned snout. Description V. mongoliensis compared in size to a human Velociraptor was a mid-sized dromaeosaurid, with adults measuring up to 2.07 m (6.8 ft) long, 0.5 m (1.6 ft) high at the hip, and weighing up to 15 kg (33 lb).[4] The skull, which grew up to 25 cm (9.8 in) long, was uniquely up-curved, concave on the upper surface and convex on the lower. Skeletal restoration. Forget Extinct: The Brontosaurus Never Even Existed. Hide captionApatosaurus (right, opposite a Diplodocus skeleton at the Carnegie Museum of Natural History in Pittsburgh), is what paleontologist Othniel Charles Marsh actually found when he thought he'd discovered the Brontosaurus.

Forget Extinct: The Brontosaurus Never Even Existed

Joshua Franzos/Carnegie Museum of Natural History Apatosaurus (right, opposite a Diplodocus skeleton at the Carnegie Museum of Natural History in Pittsburgh), is what paleontologist Othniel Charles Marsh actually found when he thought he'd discovered the Brontosaurus. It may have something to do with all those Brontosaurus burgers everyone's favorite modern stone-age family ate, but when you think of a giant dinosaur with a tiny head and long, swooping tail, the Brontosaurus is probably what you're seeing in your mind. Well hold on: Scientifically speaking, there's no such thing as a Brontosaurus. Even if you knew that, you may not know how the fictional dinosaur came to star in the prehistoric landscape of popular imagination for so long.

First dinosaur ever found with both feathers and scales. First Dinosaur Tail Found Preserved in Amber. Watch: Pictures of the First Dinosaur Tail Ever Preserved in Amber While individual dinosaur-era feathers have been found in amber, and evidence for feathered dinosaurs is captured in fossil impressions, this is the first time that scientists are able to clearly associate well-preserved feathers with a dinosaur, and in turn gain a better understanding of the evolution and structure of dinosaur feathers.

First Dinosaur Tail Found Preserved in Amber

Mystery of dinosaur with giant arms solved. 22 October 2014Last updated at 20:31 ET By Rebecca Morelle Science Correspondent, BBC News.

Mystery of dinosaur with giant arms solved

First Venezuelan dino provides clues to dinosaur evolution. Largest Known Predatory Dinosaur in Europe Found, Was "Big Bruiser" A new species of dinosaur found in Portugal was big—and bad, a new study says.

Largest Known Predatory Dinosaur in Europe Found, Was "Big Bruiser"

Torvosaurus gurneyi, perhaps the biggest predatory dinosaur yet found in Europe, was an especially strong carnivore that likely used its four-inch-long (ten-centimeter-long), blade-shaped teeth and sharp-clawed forearms to rip into its prey. The 32-foot-long (10-meter-long) beast roamed the Iberian Peninsula—home to modern-day Spain, Portugal, Andorra, and parts of France—about 150 million years ago during the late Jurassic period. (See pictures of life during the Jurassic.) Christophe Hendrickx, a Ph.D. student at the New University of Lisbon in Portugal, discovered the giant while studying bones believed to belong to Torvosaurus tanneri, a related species that lived in North America's Rocky Mountain region around the same time.

When the continents were connected as part of the supercontinent Pangaea, dinosaurs could potentially have migrated from North America to Europe or vice versa. T. Longest Dinosaurs. 5 Bizarre Dinosaurs You Didn't Know Existed. Admit it, everything you know about dinosaurs you learned from watching Jurassic Park.

5 Bizarre Dinosaurs You Didn't Know Existed

Or, possibly, you learned it while paying attention in school. That's never really been our scene, but to each their own. But no matter what route you took, there's a good chance your education was less than adequate. If that wasn't the case, you'd already know about these ridiculous dinosaurs that history seems to have forgotten ... #5. Homestead.com Look, we're all adults here. Oh, you thought we were going to mention the shiny red shaft and matching set of testicles that's taken up permanent residence on this absurd dinosaur's stupid head? Museum features two T-rex's going at it. Cows of the Cretaceous. The hadrosaurids, or duck-billed dinosaurs, were among the most successful plant-eating dinos to roam the earth.

Cows of the Cretaceous

They ranged widely in North America, Europe, and Asia during the Upper Cretaceous period, about 100 million years ago to 65 million years ago. What was the secret to their success? Egg-laying beginning of the end for dinosaurs. Their reproductive strategy spelled the beginning of the end: The fact that dinosaurs laid eggs put them at a considerable disadvantage compared to viviparous mammals.

Egg-laying beginning of the end for dinosaurs

Artist interpretation of a Dakotaraptor and her chicks.